Support for cross-arms.



J. M. HUMIsTo SUPPORT FOR GROSS PPPPPPPPPPPPPPPPPPPPPPPPP 6. 900,545.Patented Oct. 6, 1908.

l'erly cut again on a plied to the UNiTED STATES! PATENT OFFICE.

JOHN M. HUMISTON, OF BERWYN, ILLINOIS,

CORPORATION OF -ILLINOIS- sUPPoRfr Fon cRoss-ARMs. V

To all whom it may concern:

Be it known that I, ,JOHN citizen of the Uited States resident of Ber n,county of Cook, and State of Illinois, aveinvented-a new and usefulImprovement in Supports for Cross-.. Arms, of which the following isl a,specifioatlon.

M. HUM1sToN,`a of America, and

M invention relates to devices by means of w 'ch lcross arms used forcarrying electric wires, may be attached to their supfporting poles.vPrior to my inve'ntion thereo it has v een customary to attach suchcross arms to 'which may be mentioned the weakening of the'pole,andadded eXposure.

to the rotting lnfluences of the weather and'the cost in'labor ofproperly' cuttin the gain. Owing to the fact that it is a d' cult matterto pro ole that is standing, t e practice has enera y been adopted ofcutting, before t e ole is raised, as mang gains in the pole 'as is tought will. be need'e in the future, even though a fewerv number ofcross arms than that number are tobiev immediately provided. As a resultmany gains'are cut 'ltlhatare not used for a number of-ye'ars if It isthe object of my-invention to provide a'device which Will form a properseat for the arm, which will not weaken thel pole orv facilitate itsrotting, and which will be veasily a ole when standing, and thus db iaway With t e necessity of providingat the time of originalconstruction, more gains than are to be immediately needed,

My invention is .illustrated in the 'aecom-v v .panying sheet ofdrawings, in which -Figure 1 shows the top of a pole towhich aSpecification of Lettere Patent. Application flled June 4, 1906. SerialNo. 320,192.

Patented out. e, 1908.

cross arm has been applied by means of my device; Fig. 2 shows a'planview of the same partly in section, the section being taken on theplane indicated by the line a a in Fig. 1; Fig. 3 is a perspectiveviewof the device in its preferred form; Figs. 4 and 5 show two views of a\cross arm attached fto a' ole by means of a modified form of my device,the view of Fig. 4 being a plan view.v partly in section, the sectionbeing taken in .the lane of line bb of Fi 5. Fig. 6 shows a simi ar viewto that of method of attachment of a cross arm to 'a pole by meansofstill another modification of my device, and Fig. 7 shows a.perspective view of this latter modification.

' Referring. now more `particularly to the preferred form of myinvention in Figs. 1, 2

k ASSIGNOR TO STEEL GAIN MANUFACTURING COMPANY, OF CHICAGO, lILLINOIS, Ai

igs. 2 and 4, illustrating the and 3, A indicates the device' as awhole.

This is formed referably from a flat piece of 'sheet steel ma e first'into a suitable blank AandJolrer'i'leiit so as to have projectingflanges B B', projectingfflanges C C',

two forwardly i plate from which the device lsformed, toether with` theforwardly projeoting flanges s B' form a'seat or which serves the samepurpose as the notch usually cut in the vpole-inv accordance with theold method above out-lined. The two rearwardly projectin flanges C C'serve to engae the rIpole as is c early indicated in Figs. 1 an 2. hedevice A and the cross arm E are held in lace on the pole by means ofthe throughbot F passing gain for the cross armE,

through both cross arm and pole, and-through the opening D in f thepiece 'A4 In order thatthe nut f of the vbolt F and the` head of thatbolt' may not 'sink into thewood of the respectively, lar

provided as clear y indicated in Fig. 2.

pole and cross arm e washers` f'. and f' are The forwardly projecti'ngflanges B' BI are made just far enough apart to snugly embrace the crossarm E and thus prevent the movement lof the arm in the socket thusformed for it. Owing to the fact that poles for use in electricalconstructionare ordinarily round rather than rectangular, and owingfurther to the fact thattheir size varies to a considerable' extent therearwardly projecting flanges C C' are made of different form than thosewhich embrace the rectangular cross arm. The rear portion of theseflanges areobent into such sha e as to conform to the approximatelycylinc iical surface of the pole. The radius of curvature of the innersurfaees, of the flanges C C' are preferred to be made somewhat smallerthan the radius of the smallestpole to Which the device is to beapplied, so that there will be a tendency for the corner edges c c' toproject somewhat into the surface of the pole. On the poles of largerradius the tightening of the nut f upon the bolt F, will by virtue ofthe resiliency of the flanges C C' allow the inner surface of theseflanges to conform to the surface of the pole. A peeuliar advantagebrought about by this construction is that when a cross arm is thusattached to a pole that is not thoroughly seasoned, the resiliency ofthe flanges U (Y, and of the metal to which they are attached, willcompensate in large measure for any shrinkage in the diameter of thepole which may be caused byits drying out. The hole D in the center ofthe device A ispreferably made large so as to allow access of air tothose parts of the exposed surfaces of the wood between the cross armand the ole. In this way any tendency to rot which might eXist, due toretained moisture, is larfrely obviated. If desired, however, the ho e Dmay' be redueed to circular form and of such size only as to admit ofthe passage of the bolt F throu h it. f

In Jie modification shown in Figs. 4 and 5, the device A, retaining theprincipal features of that shown in Figs. 1, 2 and 3, is made of suchdesign as to adapt it to being east rather than formed from sheet metal.The forwardly projecting flanges B B' are best shown in Fig. 5 and therearwardly projeeting fian es C C' being best shown in Fig. 4. In this.atter figure the device is shown as applied to a pole having about assmall a radius as the device is well adapted to fit without trimming thepole. For larger diameters of poles the cross arm would stand out fromthe pole rather than lie flat against it as viewed in this fi ure. If itbecame nec- 4 essary to apply the evice to a pole of even smallerrelative diameter than that shown in this figure, then this could beaccomplished by trimming away a small portion of the face of the poleagainst which the cross arm would otherwise bear. The employment of thislatter expedient could be obviated by makeoone ing the inner surfaces ofthe flanges C C' so related to each other that they would both bearfirmly against even the smallest pole that might be used.

The modification shown in Figs. 6 and 7 is preferably to be made ofsheet steel. ln this there are four forwardly proj ccting lugs orfianges B B' B2 and B3, and two rearwardly projecting flanges C and (J',each of which has two rearwardly projecting points c c' and c e*respectively. The method of applying cross arms to a pole by means ofthis device and the adaptability of the .device to poles havingdifferent diameters, is quite obvious from an inspection of Fig. 6. Thepoints c c' in this case actually enter into the Substance of the woodof the pole and thus prevent movement of the device A, and consequentlyof the cross arm E with respect to the pole.

I do not wish to limit myself to the exaet forms I have here shown, anddeseribed. lt is obvious that many changes of form might be made withoutdeparting from the spirit of my invention.

What I claim as new and desire to secure by Letters Patent is:

1. The combination of a pole, a cross-arm, a single interposed memberhaving a plane surface to receive the cross-arm, and a curved surfaceformed in resilient material adapted to engage the pole, and means forelamping said member and the cross-arm to the po e.

2. The combination of a pole, a cross-arm, a body having a plane surfaceagainst which said cross-arm may rest, and a smooth curved surfaceadapted to engage the pole, means to prevent the cross-arm from movingon said body, and a through bolt for clamping the support against thepole.

3. The combination of a pole, a cross-arm, an interposed support havinga smooth curved surface for engaging the pole, and projecting membersfor engaging the cross-arm to prevent angular motion thcreof, and athrough bolt for clamping the cross-arm and support to the pole.

4. The combination of a pole, a cross-arm, a single member interposedbetween them provided with a smooth curved surface, to engage the pole,and arms to engage the cross-arm, and a bolt passing through theIcross-arm, the interposed member, and the pole for securing all theparts together.

5. A support for eross-arms comprising a sheet metal plate havingforwardly projecting fianges for engaging the cross-arm, and rearwardlyprojecting fianges adapted to partially surround a pole, said flangesbeing integral-with the plate.

6. Supporting means for cross-arms, comprising a metaf plate, forwardlyprojecting horizontal fianges on said plate forming a gain to receive across-arm, rearwardly pro- Jectmg fianges curved to eonform to the sur-Godset face'of a pole, and plate to the pole. 4

7. Supporting means for cross-arms comrising ametal plate, forwardlyprojecting iiorizontal fianges on said plate orming a gain togreceive across arm, rearwardly' proj ecting fianges curved to conformto thesurface of a pole, and a bolt for clamping the cross arm in said gainand said fianges against the pole. f

8. Supporting means for cross-arms comprising a metal plate'againstwhich a crossarm is adapted to rest, with rearwardly proiecting fiangeson said plate adapted to emrace the surface of the pole to which themeans for clamping the cross-arm is to be attached.

v a pole.

rest, flan es a 9. Supporting means for cross-arms comprising a metalplate against which a cross arm is adapted to be clamped, rearwardlyprojecting fianges on said plate angularly disposed with respect to eacother and the plate, so as to ada t them to the surfaces ofv poles ofdifferent' iameters, and means for securing the cross-arm to the plateand the plate to a pole. f

10. Supportin `means for cross-arms comprising a channe piece ada ted toreceive a cross arm and to be applie to apole, a bolt passin through thechannel piece and also throug the cross-arm and pole when in position,and a resilient member ada ted to conform itself to the curvature oft epole surface under pressure from said bolt.

11. Supporting means for eross-arms comprising a member having achannel-way to receive a cross arm, and a surface to engage a pole,l abolt passing through the member and also through the cross-arm and polewhen the parts are in place, said member befigure, in cross section.

13. A. support for cross-arme having twoi channel-ways, one beingrectangul'ar in crosssection and adapted to receive a cross-arm, and theother formed by resilient fianges and varying its figure to conform tothe contour of a po e. v .v

14. A support for cross-arme having a plane surface a ainst which across-arm may.

apted to engage the crossarm and old it in position, and a curvedsurface formed by fianges adapted to engage 15. A support for'cross-arm's having a lane surface ada ted to receive a cross-arm,forwardly exten mg fianges to engage and control the position of the armon said face; and an op osite surface formed by rearwardly exteninglflanges and curved so as to be adapted to t e surface' of a pole.

16. A support for cross-arms having a resilient member adapted to engagea pole, a plane surface adapted to engage a cross-arm,

adapted to embrace and hold thearm at right angles to the pole. .v

17. A support for cross-arms having separately curved resilient membersadapted to engage a pole, and a plane surface adapted to engage across-arm, with fianges oifstanding from said surface adapted to embraceand hold said cross-arm.

18. In combination, a pole, a cross-arm, and an interposed supportcomprising as elements a cross-arm member and 'a resilient pole member,with means to engage said members and hold' the cross-arm at rightangles to the ole. T

- 19. In com ination, apole, a cross-arm, an interposed sheet metalsupport having a resilient curved surface part1ally surrounding the ingt e cross-arm to prevent angular motion thereof with respect to thepole, and means for clamping said support and cross-arm in polsitionwith the latter at right angles to the o e. 1. I p 20. In combination, apole, a cross-arm,

and fianges off-standing from saidsulface and a single integralsupporting device i adapted to be in'ter osed between the ole and arm,one face o said device shape to embrace the pole and the other to restagainst theface of the v curing bolt passing through the center of thepole, the cross-arm and the said interposed device. 4 l,

21. In combination, a pole, a cross-arm, and meansfor supporting the armhorizontall on the ole comprislng a unitary integra device a apted to beinterposed between the pole and arm, said device having one face plainand shaped to embrace'the pole in order to prevent turning thereon, andanother face receiving the cross-arm With means to prevent its turningthereon, and a through bolt for binding the pole and arm together withsaid device between them.

224. In combination, a pole, a cross-arm, a single intermediate memberlying between `the pole andl cross-arm' with its opposite' lsides shapedand adapted to spectively and positioned so asto'have its Lfit the tworei longitudlnal axis approximately bisected by a line passing throughthe center of the pole to the cross-arm, an i a perpendicularly throughbolt assing through the arm, the intermediate evice, and t e pole onsaid me.- I

23.' In combination, a pole, a cross-arm,

cross-arm, and a seandmeans for supporting the' arm on the r pole,comprising a single integral device adapted to be inter osed between thearm and the pole, said evice havin adapted to embrace'the pole,

ymembers an a member v 433, aoogscs for supportin the cross-ann, and asecui'ing arm, and a securing bolt passing through the 10 bolt passing trough the pole, the cross-arm center of the pole, the cross-ann and theinand the interposed devce. ter osed device.

24. In combination, a pole, a cross-ann, igned by me at Quincy, Adamscounty,

rand means for supnorting the arm on the Illinois, in the pi'esence oftwo witnesses.

pole com rising a evice adapted to be in- JOHN M. HUMISTON. terposedetween them, one face of said de- Witnesses:

vice shaped to embrace the pole and the S. F. SooTT, other to restagainst the face of the cross MONTAGUE FERRY.

